Marine Radio - VHF/MF/HF SSB and NAVTEX
If INMARSAT-C is not fitted on a blue water yacht, then a marine MF/HF radio should be, preferably with DSC capability. To use this requires the Long Range Licence (LRC) which can be obtained following a short course at a number of RYA recognised training centres. Use Google and ask for HF + long range certificate, several training centres will leap out of the page.
To operate legally a marine transceiver, whether VHF or MF/HF, it is necessary to have both a certificate of competence and a Ship Licence. Identification of the vessel is by a unique 5 letter/digit call sign. The operator must hold a certificate of competence or be under supervision of a qualified operator. For Anhinga, the call sign is MPJV7. That call sign stays with the vessel unless it is flagged by another country. A Ship Licence is no obtainable at no cost from OFCOM.. See Appendix 2.
MF/HF radio is very useful for voice broadcasts of Marine Safety Information (MSI) and to receive GMDSS services such as RadioFax and
Up to about 300 to 400 nautical miles offshore, NAVTEX is the prime method of receiving MSI. Unlike INMARSAT-C, it is a receive only system, no licence is required. Like INMARSAT-C the information, as the name suggests is all in text or numeric form.
A transceiver enables contact with other vessels and shore stations. With the addition of a modem, it can, very usefully send and receive emails. For an operator with the LRC, this requires having a contract with a commercial service such as that run by GlobalMarineNet or to subscribe to the user owned service, SailMail..
Amateur Radio - "HAM"
An attractive alternative, used by many blue water sailors, is to become an amateur radio operator – generally referred to as a “HAM.” This allows use of the amateur radio bands. As a qualified HAM you can join Winlink at no cost thus gaining access, by email, to the many items in the Winlink catalog or just to send emails to your friends and relations. A rather out of date version of the Winlink catalog is one another page of this site.
An amateur operator has a unique call sign allocated to the individual. My round the world friend, Ross an Australian has a United States call sign KF6UIY. His wife has a different call sign although both may call from the same location, their yacht. This is unlike Marine radio operation where the call sign identifies the vessel and not the operator.
A Full UK Amateur Licence holder may, with permission, operate from a Vessel at sea, defined as to the seaward side of the UK low water line or in international waters. It does not include the territorial waters of other countries, who will define their own conditions.
In the UK written permission is needed to install, use, or change an amateur radio in a vessel and a log of operations may be required. Maritime services may request radio silences which must be observed.
The frequencies issued internationally to amateur radio are listed in the International Telecommunications Union (ITU) and vary in each of the three
ITU regions. The UK, most of Europe and Russia are in region 1. The Americas are in region 2 and region 3 includes China, Australasia, etc. Only those frequencies allocated internationally in that region must be used.
The current route to the Full Licence is via a Foundation Licence; followed by an Intermediate Licence. In order to be able to have legitimate use of amateur bands from a marine-mobile station i.e. a ships radio cabin requires the Full Licence from Radio Society of Great Britain. The RSGB website carries details. The Foundation and Intermediate Licences are for broadcasting within the UK only and are not internationally recognised. With these certificates alone, it is illegal for UK flagged vessels to use the amateur bands when outside the UK low tide line or in international waters.
Of course, and as with any HF transmission, anyone may listen to amateur transmissions such as the well known station on the 14,303 frequency, at 0800 and 1800 daily, (Call sign G4FRN), which is listened to by many yachts irrespective of not having a Full Licence from RSGB. However the station will not respond to a call save from a station not identifying itself by means of a recognised RSGB call sign, or a similarly approved foreign call sign.
Going down the HAM route is not a trivial matter but can have enormous benefits in terms of operating costs both for long distance sailors and for coastal sailors with the interest to go down that fascinating route.
Iridium and Mobile Phones |
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Iridium is
clearly a very useful bit of kit. It allows
communication to land from virtually anywhere that
most leisure yachts will venture. With data
compression and other techniques, texts of all
forecasts, including those broadcast under the
Global
Maritime Distress and Safety System (GMDSS) as well
as GRIB files can be accessed reasonably easily and,
with care, at a cost that may not be too prohibitive.
The downside is that communication with another vessel in an emergency may well not be possible, warnings are not received automatically, coverage is not guaranteed – see Robin Knox-Johnson’s last round the world experiences. |
Like a
conventional mobile phone, it is useful but it does
not replace GMDSS equipment. Iridium is an additional
bit of kit not for standalone use at sea. It is for these reasons that all official advice is that Mobile phones are not a replacement for conventional radio. Another is that a distress call can, if long enough be located by the coast guard using direction finding aerials. A distress call from a mobile phone can be received anywhere in the UK and take linger to process. There is no D/F capability. nevertheless, there have been several reports of lives being saved by use of mobile or satellite phone. Both must be useful additions on a yacht. Notes on the use of mobile phones are on another page of this site. |
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Appendix 1. MCA Recommendations for leisure vessels |
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R=Recommended - O=Optional |
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Appendix 2. Ship Radio Licences |
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The Ship Radio Licence allows the installation and
use, provided the user is qualified, of
Equipment must only operate on recognised maritime radio frequencies. The Ship's Radio Licence should always be kept on board. I shows the following: - |
HF and VHF/DSC portable radios are covered by the licence but may only be used on the named vessel. A Ship Portable Radio Licence is for use when a portable set is to be used on a number of different vessels. The licence also covers one PLB and one EPIRB. All details regarding the licensing of marine radio equipment can be found in the OFCOM leaflet Ship Radio Guidance notes for licensing, Of168a |
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Appendix 3. Certificates of Competence for marine radio |
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The SRC is awarded to candidates who can demonstrate how routine, safety, urgency and distress communications are organised in a GMDSS Sea Area A1 That is within VHF distance of the coast.. A practical examination in the use of a DSC controller is included, together with NAVTEX, SARTs and EPIRBs. If you have a radio-telephony certificate (ie the VHF Only certificate) it is possible to upgrade to the SRC by taking a modular course (typically 1 day, including the examination). For candidates with no current radio operating qualification, the SRC is available by taking a more comprehensive course (typically 2 days) which, in |
Long Range Certificate (LRC) |
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See also my page on various types of communications equipment and their uses,
© Frank Singleton, March 2008